Enterprise Network & Systems Administration | Linux, pfSense & VPN
I have extensive professional experience administering enterprise production infrastructure supporting approximately 500–1,000 users.
My responsibilities included:
Linux & Virtualization: Administration of Linux and Windows servers, virtual machines, and Proxmox virtualization infrastructure.
Network Security: Installation, configuration, and maintenance of pfSense firewalls and Squid proxy services.
VPN Connectivity: Implementation and troubleshooting of secure OpenVPN and IPsec connections.
Enterprise Networking: Administration of Cisco switches, routers, and network infrastructure.
Identity Management: Configuration and administration of FreeIPA and FreeRADIUS for centralized authentication and access control.
Infrastructure Monitoring: Monitoring servers, networks, and critical services using Nagios, Zabbix, PRTG, and NetXMS.
Troubleshooting: Diagnosing connectivity, performance, authentication, and service availability problems.
This experience involved maintaining real organizational infrastructure, resolving operational incidents, and supporting reliable IT services in a production environment.
Technologies: Linux, Windows Server, Proxmox, pfSense, Squid, OpenVPN, IPsec, Cisco, FreeIPA, FreeRADIUS, Zabbix, Nagios, PRTG, NetXMS.
Professional experience showcase. Any accompanying architecture illustration is representative and does not disclose confidential employer infrastructure.
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Automated FAQ Response System | n8n & PostgreSQL
I built an intelligent email automation system using n8n, Gmail, PostgreSQL, and JavaScript to streamline responses to frequently asked questions.
The workflow automatically:
Monitors incoming Gmail messages.
Identifies FAQ categories based on email content.
Retrieves approved answers from a PostgreSQL knowledge base.
Creates Gmail reply drafts using verified information.
Flags unmatched questions for manual review.
Prevents duplicate drafts and maintains email conversation threading.
The system keeps a human in control by preparing drafts rather than automatically sending replies.
Technologies: n8n, Gmail API, PostgreSQL, JavaScript, SQL.
Personal automation portfolio project.
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Freelance Application Tracker | n8n + Gmail + Google Sheets
I built an automated workflow using n8n, Gmail, Google Sheets, and JavaScript to simplify freelance job application tracking.
The system automatically:
Processes incoming application-related emails.
Matches messages to existing job applications.
Identifies replies, interviews, offers, and rejections.
Updates application statuses in Google Sheets.
Flags uncertain matches for manual review to prevent incorrect updates.
This personal portfolio project demonstrates practical experience with workflow automation, email processing, conditional logic, and Google Workspace integrations.
Technologies: n8n, Gmail API, Google Sheets, JavaScript.
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Self-managed Linux VPS Infrastructure Deployment
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